Re: [Maxima-discuss] trigonometric numbers in radical form

[serge de m. <sde...@gm...>]

The ntrig package can help you.

(%i1) load(ntrig)$
(%i2) cos(3*%pi/5);
                                  1 - sqrt(5)
(%o2)                             -----------
                                       4

  serge



On Thu, Sep 15, 2016 at 11:00 PM, Nathaniel Morck Beaver <
nbe...@gm...> wrote:

> I have a beginner's question for Maxima: how can I obtain trigonometric
> numbers in radical form?
>
> For example, this expression gives a nice radical form:
>
>      (%i) cos( 3 * %pi / 4);
>                                             1
>      (%o)                              - -------
>                                          sqrt(2)
>
>
> But this one does not:
>
>      (%i) cos(3 * %pi / 5);
>                                           3 %pi
>      (%o)                             cos(-----)
>                                             5
>
>
> I would expect it to show something like this:
>
>      (%i) cos( 3 * %pi / 5);
>                                        1 - sqrt(5)
>      (%o)                              -----------
>                                             4
>
> Many thanks,
>
> Nathaniel Beaver
>
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